CNN
Hints：Caster Semenya，African Junior Championship，The IAAF
After Caster Semenya posted a world best time of African Junior Championships 3 weeks ago, track's governing body, the IAAF, asked the South African Athletic Federation to administer a gender test. Then on Wednesday, the 18-year-old, unheard of until the summer, pulled off a stunning win in the Women's 800 Meters at the World Championships, further fueling speculation. The IAAF confirmed there are currently two investigations underway, one in South Africa and one in Berlin where the World Championships are taking place.